My guess is, they will arrest or kill all Tibetans before the games begin.
OPINION:
Yes.
“before the games begin” you say!
Where’s Richard Gere? Where’s Hollywood? How can the Games begin?
They will also clean up Beijing. Homeless, vagrants, and other 'eye-sores' will be moved out of the city.
Residents would be encouraged to stay home, preventing them from clogging streets. The place would be sanitized.